MYCOPHENOLATE MOFETIL HIGH DOSE ORAL SUSPENSIONS

Abstract: High dose, dry granulations and aqueous oral suspensions of mycophenolate mofetil or mycophenolic acid, contain: active compound (7.5-30 %), suspending/viscosity agent, sweetener, flavor, buffer (to a pH of 5-7), and optionally contain flavor enhancer, wetting agent, antimicrobial agent and color.

Description: MYCOPHENOLATE MOFETIL HIGH DOSE ORAL SUSPENSIONS Field of the Invention The present invention relates to mycophenolate mofetil and mycophenolic acid, particularly to improved formulations thereof, and specifically to high dose oral suspension formulations. The invention is also directed to methods of manufacturing the formulations. Background Information Mycophenolic acid ("MPA") was initially described as a weakly-active antibiotic found in the fermentation broth of Penicillium brevi compaction, having the following structure: Mycophenolic Acid MPA and certain related compounds, such as mycophenolate mofetil (the orpholinoethyl ester of MPA) , having the following structure: Mycophenolate Mofetil have more recently been described as having particularly advantageous therapeutic properties, e.g., as immunosuppreεsant drugs. See, for example, U.S. Patents Nos. 3,880,995; 4,727,069; 4,753,935; and 4,786,637, all incorporated herein by reference. MPA and mycophenolate mofetil, notwithstanding the improved oral bioavailability characteristics of the latter, require daily doses on the order of 2.0 to as much as 3.5 or 4.0 grams per day (or even 5.0 grams per day in the case of MPA, for example as described in U.S. Patent No. 3,880,995) depending upon the patient and the disease state being treated. Using a conventional dosage formulation containing 250 mg in a standard size 1 (0.48 cc volume) capsule, a patient receiving a 3.0 gram daily dose is required to take twelve capsules each day, giving rise to patient convenience and compliance concerns. Coarse dispersions, such as oral suspensions, contain a finely divided insoluble material suspended in a liquid medium. These are described, for example, in Remington's Pharmaceutical Sciences (Fifteenth Edition, Chapters 22 and 83, 1975) and for specific products in the Physicians' Desk Reference (46th Edition, Medical Economics Date, 1992) . Oral suspensions are known for ease of administration, for example, to children or elderly adults, and are not typically employed for the purpose of attaining high dose formulations. Certain "ready to use" suspension vehicles, such as Ora-Plus™ combined with Ora-Sweet™ (both available from Paddock Laboratories, Inc. of Minneapolis, MN) are available for extemporaneous compounding needs, but their suitability for any particular active agent must be determined on a case by case basis. Moreover, such vehicles are contraindicated for long term stability and, therefore, intended only for short term use. Oral suspensions of mycophenolate mofetil have been described, for example, in U.S. Patent No.4,753,935 (see, Example 7), but at a relatively low dose incorporating 1 gram of active compound in 100 mL. While such suspensions are functional, they are subject to the same patient convenience and compliance concerns as prior low dose capsule formulations. It has remained desired to provide high dose oral formulations for MPA and mycophenolate mofetil, particularly in view of the relatively high daily doses required for administration. SUMMARY OF THE INVENTION The present invention concerns high dose oral suspensions of mycophenolate mofetil or mycophenolic acid, and methods of manufacture therefor. In one aspect, the invention relates to high dose oral suspensions having a composition as follows: Ingredient % wt/vol mycophenolate mofetil or mycophenolic acid 7.5 - 30.0 suspending/viscosity agent 0.1 - 3.0 wetting agent 0 - 0.5 sweeteners 30.0 - 70.0 flavor 0.1 - 2.0 flavor enhancer/bitter maskant 0 - 1.0 buffer to pH 5.0 - 7.0 0.5 - 1.5 antimicrobial agent 0 - 10.0 color 0 - 0.01 purified water q.s. to 100 In a presently preferred aspect, the invention relates to a high dose oral suspension of mycophenolate mofetil having a composition as follows: Ingredient % wt/vol mycophenolate mofetil 20 hydroxypropylmethylcellulose 0.25 . microcrystalline cellulose 0.25 xanthan gum 0.1 sorbitol, 70% solution 30 - 50 Lycasin * (maltitol syrup) 10 - 30 sucrose 0 - 10 fructose 0 - 10 aspartame 0 - 0.5 lecithin 0 - 0.1 citric acid 0.02 - 0.25 sodium phosphate dibasic 0.19 - 0.67 methyl paraben 0 - 0.18 propyl paraben 0 - 0.02 flavor (selected from grape, (opt. r/anise) , 0.3 - 1.0 cherry, strawberry, or mint) Magnasweet * 0 - 1 color(s) (selected from red 28, red 4400,, 0.005 blue 1, blue 2, or green 3) purified water q.s. to 100 In another presently preferred aspect, the invention relates to a high dose oral suspension of mycophenolate mofetil having a composition as follows: Ingredient % wt/vol mycophenolate mofetil 20 microcrystalline cellulose 0.25 xanthan gum 0.1 sorbitol, 70% solution 30 - 50 Lycasin * (maltitol syrup) 10 - 30 sucrose 0 - 10 fructose 0 - 10 aspartame 0 - 0.5 lecithin 0 - 0.5 citric acid 0.02 - 0.25 sodium phosphate dibasic 0.19 - 0.8 methyl paraben 0 - 0.18 propyl paraben 0 - 0.02 flavor (selected from grape (opt. w/anise) , 0.1 - 3.0 cherry, strawberry, mint, orange, berry, or mixed fruit) Magnasweet * 0 - 1 color(s) (selected from red 28, red 40, 0.005 red #3, yellow #6, blue 1, blue 2, or green 3) purified water q.s. to 100 In another aspect, the invention relates to a dry granulation formulation of mycophenolate mofetil for constitution with water to give a high dose oral suspension, having a composition as follows: Ingredient mg/mL* mycophenolate mofetil or mycophenolic acid 75 - 300 suspending/viscosity agent 1 - 30 wetting agent 0 - 10 sweeteners 1 - 1200 flavor 0.1 - 100 flavor enhancer/bitter maskant 0 - 50 antimicrobial agent 0 - 10 color 0 - 2 (*concentration after constitution with water) . In a presently preferable aspect, the invention relates to a dry granulation formulation of mycophenolate mofetil for constitution with water to give a high dose oral suspension, having a composition as follows: Ingredient mg/mL* mycophenolate mofetil 200 xanthan gum 1 - 1.5 collodial silicon dioxide 5 - 10 sorbitol 0 - 550 aspartame 0 - 3 soy lecithin 1 - 2 sodium methyl paraben 0 - 10 flavor ((selected from grape (opt. w/anise) , 0.1 - 3.0 cherry, strawberry, mint, orange, berry, or mixed fruit) color (red, blue, and/or yellow to complement 0.01 - 0.1 the flavor) (♦concentration after constitution with water) . DETAILED DESCRIPTION OF THE INVENTION Definitions and General Parameters The following definitions are set forth to illustrate and define the meaning and scope of the various terms used to describe the invention herein. Reference to the active agent employed in the formulations of the present invention, "mycophenolate mofetil," is intended to include the pharmaceutically acceptable salts thereof. The term "effective amount" means a dosage sufficient to provide treatment for the disease state being treated. This will vary depending on the patient, the disease and the treatment being effected. The term "% wt/vol" or "percent weight/volume" refers to the amount of excipient and/or drug substance, measured by weight (grams) , that is contained in the final volume (milliliters) of a suspension. The amount of excipient and/or drug substance is expressed as a percent of the total, final volume of the liquid product. Manufacturing Parameters The term "q.s." means adding a quantity sufficient to achieve a stated function, e.g., to bring a solution to the desired volume (i.e., 100%) . Unless specified to the contrary, the procedures described herein take place at atmospheric pressure within a temperature range from 5°C to 100°C (preferably from 10°C to 50°C; most preferably at "room" or "ambient" temperature, e.g., 20°C) . Unless otherwise specified, the composition percentages, times and conditions are intended to be approximate, e.g., add about 10% wt/vol at about atmospheric pressure within a temperature range of about 5°C to about 100°C (preferably from about 10°C to about 50°C; most preferably about 20°C) over a period of about 1 to about 10 hours (preferably about 5 hours) . Parameters given in the Examples are intended to be specific, not approximate. Materials Mycophenolate mofetil can be made as described in U.S. Patent No. 4,753,935, previously incorporated by reference. It is presently preferred to make mycophenolate mofetil as described in U.S. Patent No. 5,247,083, incorporated herein by reference. Mycophenolic acid is commercially available, e.g., from Sigma Chemical Company, St. Louis, MO. The sources of various excipients are disclosed below, e.g., where the material is not commonly available or when the product of a particular source is preferred. Suspending and/or viscosity increasing agents useful in the formulations of the invention include, for example: hydroxypropyl methylcellulose (preferably USP: hydroxypropyl methylcellulose 2910) ; xanthan gum (preferably NF: xanthan gum, and most preferably Keltrol ® CR, available from Kelco, San Diego, CA) ; microcrystalline cellulose (which is a colloidal suspending agent, preferably NF: microcrystalline cellulose, and most preferably Avicel ® RC-591, available from FMC Corporation, Philadelphia, PA) ; sodium carboxymethylcellulose (preferably USP: carboxymethylcellulose sodium, or BP: carmellose sodium or sodium carboxymethylcellulose) ; and colloidal silicon dioxide (preferable NF: colloidal silicon dioxide, and more preferably Cab-o-sil ® M-5, available from Cabot Corporation, Tuscola, IL) . Wetting agents useful in the formulations of the invention include, for example: lecithin (compendial or non-compendial soy lecithin) and poloxamer (available as pluronic F68 from BASF Wyandotte Corporation, Parsippany, NJ) . Sweeteners useful in the formulations of the invention include, for example: sorbitol, 70% solution (preferably USP: sorbitol solution); maltitol syrup (preferably USP or NF, most preferably Lycasin ® , available from Roquette Corporation, Gurnee, IL) ; sucrose (preferably NF or BP/EP) ; fructose (preferably USP) ; aspartame (preferably NF) ; xylitol (preferably co pendial grade) ; mannitol (preferably USP or BP) ; sorbitol, powder (preferably NF or BP) ,- maltitol, crystalline (non-compendial, or preferably Maltisorb ® SF, available from Roquette Corporation, Gurnee, IL) . In cases where there is a choice of physical form, the liquid sweeteners are preferably used for the suspension formulations, and the dry sweeteners are preferably used for the dry granulation. The sweeteners (except aspartame) can also function as viscosity-increasing agents and/or as antimicrobial preservatives) . Flavors useful in the formulations of the invention include, for example: mint, strawberry, cherry, orange, berry, mixed fruit, and grape (optionally mixed with anise) . They are available from Tastemaker, Cincinnatti, OH; Crompton & Knowles Corporation, Mahwah, NJ; and International Flavors & Fragrances Inc., Camden, NJ. Flavor enhancers (or bitter maskants) useful in the formulation of the invention include, for example Magnasweet ® (available from MacAndrews & Forbes Company, Camden, N.J.). Buffers useful in the formulations of the invention include as components, for example, citric acid (preferably USP) and sodium phosphate dibasic (preferably USP) . Antimicrobial agents useful in the formulations of the invention include, for example: sodium benzoate; sodium methyl paraben (preferably NF: sodium methyl paraben) ,- methyl paraben (preferably NF: methyl paraben, or BP: methyl hydroxybenzoate, or EP: methylis parahydroxybenzoaε) ; propylparaben (preferably NF: propylparaben, or BP/EP: propyl hydroxybenzoate) ; and potassium sorbate (preferably NF or BP) . Dyes (or colors) useful in the formulations of the invention include, for example: FD&C red 28, FD&C red 40, FD&C red 3, FD&C blue 1, FD&C blue 2, FD&C yellow 6, and FD&C green 3. HIGH DOSE ORAL SUSPENSION Composition The high dose oral suspensions of the present invention have the following general composition: Ingredient % wt/vol mycophenolate mofetil or mycophenolic acid 7.5 - 30.0 suspending/viscosity agent 0.1 - 3.0 wetting agent 0 - 0.5 sweeteners 30.0 - 70.0 flavor 0.1 - 2.0 flavor enhancer/bitter maskant 0 - 1.0 buffer 0.5 - 1.5 antimicrobial agent 0 - 10.0 color 0 - 0.01 purified water q.s. to 100 Particularly when the active agent is MPA, pH must be kept below 7.0 to avoid dissolution. Presently preferred oral suspensions of the invention have the following composition: Ingredient % wt/vol mycophenolate mofetil 20 hydroxypropylmethylcellulose 0.25 microcrystalline cellulose 0.25 xanthan gum 0.1 sorbitol, 70% solution 30 - 50 Lycasin * (maltitol syrup) 10 - 30 sucrose 0 - 10 fructose 0 - 10 aspartame 0 - 0.5 lecithin 0 - 0.1 citric acid 0.02 - 0.25 sodium phosphate dibasic 0.19 - 0.67 methyl paraben 0 - 0.18 propyl paraben 0 - 0.02 flavor 0.3 - 1.0 Magnasweet * 0 - 1 color 0.005 purified water q.s. to 100 Presently more preferred oral suspension of the invention have the following composition: Ingredient % wt/vol mycophenolate mofetil 20 microcrystalline cellulose 0.2 xanthan gum 0.1 sorbitol, 70% solution 30 - 50 Lycasin * (maltitol syrup) 10 - 30 sucrose 0 - 10 fructose 0 - 10 aspartame 0 - 0.5 lecithin 0 - 0.5 citric acid 0.02 - 0.25 sodium phosphate dibasic 0.19 - 0.8 methyl paraben 0 - 0.18 propyl paraben 0 - 0.02 flavor 0.1 - 1.0 Magnasweet * 0 - 1 color 0.005 purified water q.s. to 100 Manufacturing Method 1. To heated water (about 70°C) , the antimicrobial agent was added and dispersed, followed by the suspending and/or viscosity agents (preferably microcrystalline cellulose, followed by xanthan gum) . 2. With mixing, the buffer(ε) (preferably citric acid, followed by εodiu phosphate dibasic) were dissolved, followed by sweetener(s) , wetting agent (s), dye(s), flavor enhancer(s) , and flavor(s) . 3. The active compound (mycophenolate mofetil or mycophenolic acid) was added to the mixture from step 2; the liquid was mixed well to form a suspension. DRY GRANLUATION FORMULATION Composition The dry granulation formulations of the present invention have the following general composition: Ingredient mg/mL mycophenolate mofetil or mycophenolic acid 75 - 300 εuspending/viscosity agent 10 - 30 wetting agent 3 - 10 sweetenerε 200 - 1200 flavor 3 - 100 flavor enhancer/bitter maεkant 0 - 50 antimicrobial agent 0 - 10 color 0 - 2 ( ♦ concentration after conεtitution with water) A preεently preferred dry granulation formulation haε the following composition: Ingredient mg/mL* mycophenolate mofetil 200 sodium carboxymethylcellulose 20 sucrose 0 - 700 fructose 0 - 700 xylitol 0 - 700 mannitol 0 - 1200 sorbitol 0 - 1080 maltitol 0 - 740 pluronic F68 4 - 8 flavor 10 potassium εorbate 0 - 1 color 0 - 1 ( ♦ concentration after constitution with water) A presently more preferred dry granulation formulat:ion has the following composition: Ingredient mg/mL ♦ mycophenolate mofetil 200 xanthan gum 1 - 1.5 colloidal sil: Leon dioxide 5 - 10 sucrose 0 - 700 fructose 0 - 700 xylitol 0 - 700 mannitol 0 - 1200 sorbitol 0 - 1080 maltitol 0 - 740 soy lecithin 1 - 2 flavor 1 - 10 sodium methyl paraben 0 - 10 color 0 - 1 (♦concentration after constitution with water) Manufacturing Method 1. Mycophenolate mofetil, sweetener(ε) , wetting agent(ε), and suspending and/or viscosity increasing agent(s) were weighed and combined in a mixer. 2. The dye(s) and buffer(s) were dissolved in water. 3. The solution of step (2) was added to the mixer bowl of step (1), until a desired granulation size was obtained. . The granulation was dried then milled to reduce particle εize. 5. Uεing a blender, the suεpending and/or viεcosity increasing agent(ε), flavor(s) and antimicrobial agent(ε) were added. When used aε a pharmaceutical formulation to adminiεter mycophenolate mofetil or mycophenolic acid, for example, the dry granulation formulation iε added to water in an appropriate container. The container is then sealed, shaken to give a suεpension, and adminiεtered orally. Alternatively, the granulation is provided in a container, such that when constituted with an appropriate volume of water a supply of drug in suspension is provided for an extended period of time (e.g., 90 grams of mycophenolate mofetil provided in a bottle marked to be filled with purified water to a final volume of 450 mL, provides a 30 day supply) . Preferred Formulations Presently preferred are the following formulations. Ingredient % wt/vol mycophenolate mofetil 20 hydroxypropyl methylcelluloεe 0.25 microcryεtalline celluloεe 0.25 xanthan gum 0.1 sorbitol solution 50 sucrose 10 Lycasin * 10 lecithin 0.1 methyl paraben 0.036 propylparaben 0.004 grape 1.o anise 0.01 color (red 28: blue 1, 90:10) 0.005 citric acid 0.0542 sodium phosphate dibasic 0.673 purified water q.s. to 100 adjusted to a pH of 7, as a liquid suspenεion εuitable for oral administration. Ingredient % wt/vol mycophenolate mofetil 20 microcryεtalline cellulose 0.2 xanthan gum 0.1 sorbitol solution 50 sucrose 10 Lycasin * (maltitol syrup) 10 εoy lecithin 0.1 methyl paraben 0.04 - .1 mixed fruit <0.3 color (to complement the flavor) 0.005 citric acid 0.06 εodium phoεphate dibaεic 0.7 purified water q.s. to 100 adjusted to a pH of 7, as a liquid suspension εuitable for oral administration. Ingredient mg mycophenolate mofetil 90,000 sodium carboxymethylcellulose 9,000 mannitol 180,000 aεpartame 1,575 pluronic F68 1,800 potassium sorbate 225 cherry 4,500 color (red 40:blue 1, 90:10) 4.5 in a container marked to be filled with purified water to a final predetermined volume of 450 mL. Ingredient mg mycophenolate mofetil 90,000 xanthan gum 450 colloidal silicon dioxide 2,250 soy lecithin 450 sorbitol 247,500 aspartame 225 εodium methyl paraben 900 berry flavor 1,350 color (FD&C red #3 13.5 FD&C blue #1 2.7 in a container marked to be filled with purified water to a final predetermined volume of 450 mL. Ingredient mg mycophenolate mofetil 90,000 xanthan gum 450 colloidal silicon dioxide 2,250 soy lecithin 450 sorbitol 135,000 aspartame 450 citric acid 225 sodium citrate 4,500 sodium methyl paraben 900 berry flavor 1,350 color (FD&C red #3 13.5 FD&C blue #1 2.7 in a container marked to be filled with purified water to a final predetermined volume of 450 mL. Ingredient mg mycophenolate mofetil 90,000 xanthan gum 675 colloidal silicon dioxide 4,500 soy lecithin 900 aspartame 900 sodium methyl paraben 1,035 mixed fruit flavor 900 color (FD&C red #3 3.6 FD&C yellow #6) 0.9 in a container marked to be filled with purified water to a final predetermined volume of 450 mL. Ingredient mg mycophenolate mofetil 90,000 xanthan gum 450 colloidal silicon dioxide 2,250 soy lecithin 450 sorbitol 247,500 aspartame 225 citric acid 225 sodium citrate 4,500 sodium methyl paraben 1,035 mixed fruit flavor 900 color (FD&C red #3 2.79 FD&C yellow #6) 0.675 in a container marked to be filled with purified water to a final predetermined volume of 450 mL. Ingredient mg mycophenolate mofetil 90,000 xanthan gum 675 colloidal silicon dioxide 4,500 soy lecithin 900 aεpartame 900 citric acid 225 sodium citrate 4,500 sodium methyl paraben 450 orange flavor 450 color (FD&C yellow #6) 45 in a container marked to be filled with purified water to a final predetermined volume of 450 mL. Testing, Administration and Utility Testing The following tests are performed to evaluate the suitability of formulation combinations made in accordance with the present invention. The testing procedureε are known by thoεe skilled in the art. 1. Time to conεtitute (for a dry granulation) . 2. Eaεe of reεuεpendability of εolid(ε) . 3. Appearance. 4. Amount of drug dissolved in continuous aqueous phase. 5. Chemical stability (percent label strength of drug substance). 6. % Degradant(ε) formed (e.g. mycophenolic acid from a suεpension of mycophenolate mofetil) . 7. Viεcoεity. 8. Density. 9. Freeze/thaw (aggregate formation) . 10. Sedimentation rate. 11. Sedimentation volume. 12. Homogeneity of drug substance. 13. Particle size. 14. Antimicrobial efficacy (USP/BP test) . 15. Gravitational and vibrational εtreεεes (εimulated shipping). The following testε are performed to evaluate the acceptability of formulationε made in accordance with the preεent invention. The testing procedures are known by those skilled in the art. 1. Ease of resuspendability of solid(s) . . Appearance. 3. Chemical stability (percent label strength of drug substance). 4. % Degradant(s) formed over time. 5. Viεcoεity. 6. Denεity. 7. Homogeneity of drug εubstance. 8. Particle size. 9. Antimicrobial efficacy (USP/BP test). Criteria for acceptability include those set forth below. Ease of reεuspendability -- The suspenεion εediment εhould be loosely packed such that after minimal shaking the sediment redisperseε and reformε the original suspenεion. From a practical εtandpoint, any εediment should redisperse within 10 seconds of minimal hand shaking. Appearance -- In a freshly prepared suspension, all solids should be evenly and homogeneously dispersed in the liquid phase. Over time, sedimentation will occur; and ideally, the volume of sediment should encompass the volume of suspension. If the sediment volume is less than the volume of suspension, the supernatant which forms should be clear (indicating a flocculated system) . Chemical Stability -- The amount of drug substance must remain within 90 - 110% of the intended labelled concentration. % Degradant(s) formed over time -- The formation of no more than 5% degradant(s) over a period of 2 years is considered acceptable. Viscoεity -- The viscoεity εhould be εufficiently high to hinder rapid sedimentation. However, too high a viscosity is not acceptable from a uεer's standpoint. An acceptable range is about 200 - 1000 centipoise, with a preferred range of 250 - 500 centipoise. Density -- Ideally, the density of the vehicle will equal the density of the dispersed solids (drug substance) ; matching vehicle and drug densitieε will hinder εedimentation. An acceptable range for the formulations of the preεent invention iε 1.10 - 1.25 g/mL. Homogeneity -- After minimal hand shaking of the package containing suspension, the amount of drug substance present at the top, middle, and bottom of the packaged suspension, will be equivalent within 10%. Particle Size -- Over time the mean particle size of the suspenεion will remain within 20% of the mean particle εize of freshly prepared suspenεion. Antimicrobial Efficacy -- The εuspension will be tested for antimicrobial efficacy via the methods provided in the USP and BP. To be acceptable, the suεpension must pass these tests according to the respective specifications. The formulations of the invention are satiεfactory when εubjected to the foregoing tests. As will be apparent from the present specification to those skilled in the art, the selection of particular ingredients and their relative concentrations will modify the characteristics balances of the resulting formulations. For example, a 200 mg/mL of mycophenolate mofetil can be suspended in Ora-Plus™ combined with Ora-Sweet™, but, the characteristics balance of the resulting formulation is unacceptably viscous and expected to have too much drug dissolved in the continuous aqueous phase giving rise to increaεed degradant formation and loεs of chemical stability (given the pH of the vehicles, i.e., below 5.0, the lowest acceptable pH for mycophenolate mofetil in the present formulationε) . Administration The formulationε of the preεent invention are uεeful for oral administration in any oral treatment regimen for mycophenolate mofetil or mycophenolic acid. While human dosage levels have yet to be finalized, generally, a daily dose of mycophenolate mofetil or mycophenolic acid iε from about 2.0 to 5.0 grams, preferably about 2.0 to 3.5 grams. The amount of active compound administered will, of course, be dependent on the subject and disease state being treated, the severity of the affliction, the manner and schedule of administration and the judgment of the preεcribing physician. For example, a treatment regimen for administering 3.0 gramε of mycophenolate mofetil per day, which previouεly entailed taking 12 capεuleε (250 mg) (e.g., εix, twice daily), when administered with a formulation of the present invention entailε taking one 7.5 mL dose (e.g., a spoonfull) twice daily. The formulationε of the present invention are also particularly well εuited to adminiεtration via gastric lavage. Utility The formulationε of the present invention are useful for the administration of mycophenolate mofetil or mycophenolic acid (the "compounds") as immunosuppressive agents, anti-inflammatory agents, anti- tu or agentε, anti-proliferative agents, anti-viral agents and anti- psoriatic agents (as discussed in greater detail below) in mammals, whether domestic (cattle, pigs, sheep, goats, horses) , pets (cats, dogs) , or preferably humans. The compoundε are inhibitorε of inosine onophosphate dehydrogenase (IMPDH) and thus inhibit de novo purine synthesis; they have anti-proliferative effects (e.g., against smooth muscle cellε and both B and T lymphocytes) and inhibit antibody formation and the glycosylation of cell adheεion molecules in lymphocyteε and endothelial cellε. As immunosuppreεsive agents, the compounds are useful in treating auto-immune related disorders, for example: Type I Diabetes Mellituε; Inflammatory Bowel Diεeaεe (e.g., Crohn'ε Diεeaεe and Ulcerative Colitis) ; Systemic Lupus Erythematosus,- Chronic Active Hepatitiε; Multiple Sclerosiε; Grave's Disease; Hashimoto's Thyroiditiε; Behcet'ε Syndrome; Myasthenia Graviε; Sjogren'ε Syndrome; Pernicious Anemia; Idiopathic Adrenal Insufficiency; and Polyglandular Autoimmune Syndromes Type I and II. The compounds are also useful as therapeutic immunosuppressive agents in the treatment of Asthma, Immunohemolytic Anemia, Glomerulonephritis, and Hepatitis. Preventative useε of the compounds as immunosuppressive agents include the treatment of allograft rejection, for example, in cardiac, lung, pancreatic, renal, liver, skin and corneal allograftε, and prevention of Graft vs. Host Disease. The compounds are uεeful for inhibiting proliferative responses to vascular injury, for example, stenoεis following an insult to a blood vesεel wall in poεt-angioplasty restenosiε, and post-cardiac by-pass surgery reεtenosis. The compounds are useful aε anti-inflammatory agents, for example, in treating Rheumatoid Arthritis, Juvenile Rheumatoid Arthritis and Uveitiε. Aε anti-tumor agents, the compounds are uεeful in treating solid tumors and malignancies of lymphoreticular origin. For example, the compounds' utility for treatment of solid tumorε includeε: cancers of the head and neck, including squamous cell carcinoma; lung cancer, including small cell and non-small cell lung carcinoma; mediastinal tumorε; esophageal cancer, including squamous cell carcinoma and adenocarcinoma; pancreatic cancer; cancer of the hepatobiliary system, including hepatocellular carcinoma, cholangiocarcinoma, gall bladder carcinoma and biliary tract carcinoma; small intestinal carcinoma, including adenocarcinoma, sarcoma, lymphoma and carcinoidε; colorectal cancer, including colon carcinoma and rectal carcinoma; metastatic carcinoma; cancers of the genitourinary system, including ovarian cancer, uterine sarcoma, and renal cell, ureteral, bladder, prostate, urethral, penile, testicular, vulvar, vaginal, cervical, endometrial, and fallopian tube carcinoma; breast cancer; endocrine system cancer; soft tissue sarcomas; malignant mesotheliomas; skin cancer, including squamous cell carcinoma, basal cell carcinoma and melanoma; cancer of the central nervous system; malignant bone tumors; and plasma cell neoplasms. As anti-tumor agents for the treatment of malignancies of lymphoreticular origin, the compounds are useful in treating, for example: Lymphomas and Leukemias, including B, T and promonocyte cell line malignancies, Mycoseε Fungoideε, Non-Hodgkinε Lymphoma, Malignancieε of Burkitt Lymphoma Cellε and other EBV-transformed B-lymphocytes, Lymphomas resulting from Epstein-Barr viral infectionε in allograft recipientε, Chronic Lymphocytic Leukemia, Acute Lymphocytic Leukemia and Hairy Cell Leukemi . As anti-viral agents, the compoundε are uεeful in treating, for example: retroviruεes, including Human T-leukemia Viruses, Types I and II (HTLV-1 and HTLV-2) , Human Immuno Deficiency Viruseε, Typeε I and II (HIV-1, HIV-2) and, Human Naεopharyngeal Carcinoma Virus (NPCV) and in treating Herpes Viruseε, including EBV infected B-lymphocytes, CMV infection, Herpes Virus Type 6, Herpeε Simplex, Types 1 and 2, (HSV-1, HSV-2) and Herpes Zoster. As anti-psoriatic agents, the compounds are useful in treating, for example, psoriasis and psoriatic arthritis. EXAMPLES The following preparations and examples are given to enable those skilled in the art to more clearly understand and to practice the present invention. They εhould not be conεidered as limiting the scope of the invention, but merely as being illustrative and representative thereof. EXAMPLES 1-24 These examples illuεtrate the preparation of high doεe oral εuspenεion formulations. In each Example, the formulation was manufactured by one of the following alternative methods: A. 1. To heated water, hydroxypropylmethylcellulose waε added and dispersed. 2. Microcrystalline cellulose was added to the dispersion of #1 and dispersed. 3. Xanthan gum was added to the mixture of #2 and dispersed. 4. The sweeteners, flavors, color dyeε and lecithin were added individually to the mixture of #3 with mixing. 5. In a small separate aliquot of water, citric acid and εodium phoεphate dibasic were dissolved, then added to the mixture of step 4, adjuεting pH aε indicated. 6. In a small separate aliquot of water (heated to 80°C) , methyl paraben and propylparaben were dissolved, then added to the mixture of step 5. 7. Mycophenolate mofetil was added to the mixture of step 6 and mixed well to form a suspenεion suitable for oral administration. B. 1. To heated water (70 - 75°C) , sodium methyl paraben waε diεεolved with mixing. 2. Microcryεtalline celluloεe waε added to the diεperεion of #1 and diεpersed. 3. The εorbitol solution was added and mixed to the diεperεion of #2. Xanthan gum waε added to the mixture and diεperεed. This was followed by addition of the maltitol solution with mixing. 4. In a separate vesεel containing purified water, citric acid waε added and dissolved, followed by the addition and dissolution of sodium phosphate dibasic, anhydrouε. Thiε waε followed by the diεsolution of sucrose and the addition and dispersion of soy lecithin. Mycophenolate mofetil was added and dispersed. 5. The diεperεionε of stepε 3 and 4 were combined and mixed. 6. A εtock solution of the dye waε prepared. The dye and flavor were added to the disperεion of step 5, with mixing. 7. The dispersion of step 6 was brought to volume with purified water, essary. EXAMPLE 1 Ingredient wt/vol % Mycophenolate mofetil 20 Hydroxypropylmethylcellulose 0.25 Microcrystalline cellulose 0.25 Xanthan gum 0.1 Sorbitol, 70% εolution 50 Sucroεe 10 Lycaεin * (maltitol εyrup) 10 Lecithin 0.1 Methyl paraben 0.036 Propyl paraben 0.004 Grape flavor 1.0 Anise flavor 0.01 Color (red 28:blue 1, 90:10) 0.005 Buffer Citric acid 0.241 Sodium phosphate dibasic 0.547 pH 6 Purified water q.s. to 100 EXAMPLE 2 Ingredient wt/vol % Mycophenolate mofetil 20 Hydroxypropylmethylcellulose 0.25 Microcrystalline cellulose 0.25 Xanthan gum 0.1 Sorbitol, 70% solution 50 Sucrose 10 Lycasin * (maltitol syrup) 10 Lecithin 0.1 Methyl paraben 0.036 Propyl paraben 0.004 Grape flavor 1.0 Anise flavor 0.01 Color (red 28:blue 1, 90:10) 0.005 Buffer Citric acid 0.0542 Sodium phoεphate dibasic 0.673 pH 7 Purified water q.s. to 100 EXAMPLE 3 Ingredient wt/vol % Mycophenolate mofetil 20 Hydroxypropylmethylcellulose 0.25 Microcrystalline cellulose 0.25 Xanthan gum 0.1 Sorbitol, 70% solution 50 Sucrose 10 Lyca in * (maltitol syrup) 10 Grape flavor 1.0 Anise flavor 0.01 Color (red 28:blue 1, 90:10) 0.005 Buffer Citric acid 0.0542 Sodium phoεphate dibaεic 0.673 pH 7 Purified water q.s. to 100 EXAMPLE 4 Ingredient wt/vol % Mycophenolate mofetil 20 Hydroxypropylmethylcellulose 0.2 Microcryεtalline celluloεe 0.2 Xanthan gum 0.075 Sorbitol, 70% εolution 50 Sucroεe 10 Lycasin * (maltitol εyrup) 10 Lecithin 0.1 Grape flavor 1.0 Anise flavor 0.01 Color (red 28:blue 1, 90:10) 0.005 Buffer Citric acid 0.0962 Sodium phoεphate dibasic 0.219 pH 6 Purified water q.s. to 100 EXAMPLE 5 Ingredient wt/vol % Mycophenolate mofetil 20 Hydroxypropylmethylcellulose 0.25 Microcryεtalline celluloεe 0.25 Xanthan gum 0.1 Sorbitol, 70% εolution 50 Sucrose 10 Lycasin * (maltitol εyrup) 10 Lecithin 0..1 Grape flavor 1. .0 Aniεe flavor 0. .01 Color (red 28 :blue 1 , 90 : 10) 0. .005 Buffer Citric acid 0. .0217 Sodium phoεphate dibasic 0. .269 pH 7 Purified water q. .s. to 100 EXAMPLE 6 Ingredient wt/vol % Mycophenolate mofetil 20 Hydroxypropylmethylcelluloεe 0.35 Microcrystalline cellulose 0.3 Xanthan gum 0.125 Sorbitol, 70% solution 30 Sucrose 10 Lycasin * (maltitol syrup) 30 Grape flavor 0.75 Aniεe flavor 0.01 Color (red 28:blue 1, 90:10) 0.005 Buffer Citric acid 0.0217 Sodium phosphate dibasic 0.269 pH 7 Purified water q.s. to 100 EXAMPLE 7 Ingredient wt/vol % Mycophenolate mofetil 20 Hydroxypropylmethylcelluloεe 0.25 Microcryεtalline celluloεe 0.25 Xanthan gum 0.1 Sorbitol, 70% solution 30 Sucrose 10 Lycasin * (maltitol syrup) 30 Lecithin 0.1 Grape flavor 1.0 Anise flavor 0.01 Magnasweet * 0.2 Color (red 28:blue 1, 90:10) 0.005 Buffer Citric acid 0.142 Sodium phosphate dibaεic 0.438 pH 6 Purified water q. s . to 100 EXAMPLE 8 Ingredient wt/vol % Mycophenolate mofetil 20 Hydroxypropylmethylcelluloεe 0.25 Microcrystalline celluloεe 0.25 Xanthan gum 0.1 Sorbitol, 70% solution 30 Lycaεin * (maltitol syrup) 10 Aspartame 0.5 Lecithin 0.1 Grape flavor 1.0 Anise flavor 0.01 Color (red 28:blue 1, 90:10) 0.005 Buffer Citric acid 0.0217 Sodium phosphate dibasic 0.269 pH 7 Purified water q.s. to 100 EXAMPLE 9 Ingredient wt/vol % Mycophenolate mofetil 20 Hydroxypropylmethylcellulose 0.25 Microcryεtalline cellulose 0.25 Xanthan gum 0.1 Sorbitol, 70% solution 30 Sucrose 10 Lycaεin * (maltitol εyrup) 30 Lecithin 0.1 Grape flavor 1.0 Aniεe flavor 0.01 Color (red 28:blue 1, 90:10) 0.005 Buffer Citric acid 0.136 Sodium phoεphate dibasic 0.192 pH 5 Purified water q.ε. to 100 EXAMPLE 10 Ingredient wt/vol % Mycophenolate mofetil 20 Hydroxypropylmethylcelluloεe 1 Microcryεtalline celluloεe 0.25 Sorbitol, 70% solution 50 Sucrose 10 Lycasin * (maltitol syrup) 10 Lecithin 0.1 Grape flavor 1.o Anise flavor 0.01 Magnasweet * 1 Color (red 28:blue 1, 90:10) 0.005 Buffer Citric acid 0.0217 Sodium phoεphate dibasic 0.192 pH 7 Purified water q.ε. to 100 EXAMPLE 11 Ingredient wt/vol % Mycophenolate mofetil 20 microcryεtalline cellulose 0.2 xanthan gum 0.1 Sorbitol, 70% solution 50 Sucrose 10 Lycasin * (maltitol syrup) 10 soy Lecithin 0.1 citric acid 0.06 sodium phosphate dibasic (pH 7) 0.7 methyl paraben 0.04 - 0.1 flavor <0.3 Color (to complement the flavor) 0.005 Purified water q.s. to 100 EXAMPLE 12 This example illustrates the preparation of a dry granulation of the invention. Ingredient mg mycophenolate mofetil 3,000 sodium carboxymethylcellulose 300 sorbitol, powder 3,000 xylitol 2,000 maltitol 2,000 pluronic F68 60 mint 150 FD&C green 3 0.1 The above ingredients are combined and blended to a homogeneous mixture, with the addition of adequate purified water to give a desired granule size. The mixture is granulated and then dried to give a dry granulation suitable for use as a pharmaceutical formulation by the addition of 15mL purified water followed by shaking to form a suspension having 3.0 grams of mycophenolate mofetil in 15 mL. EXAMPLE 13 This example illustrates a dry granulation of the invention. Ingredient mg mycophenolate mofetil 2,000 sodium carboxymethylcellulose 200 mannitol 4,000 aspartame 35 pluronic F68 40 cherry 100 FD&C red 40 0.1 FD&C blue 1 0.01 EXAMPLE 14 This example illuεtrates a dry granulation of the invention. Ingredient mg mycophenolate mofetil 2,000 sodium carboxymethylcellulose 200 sorbitol, powder 10,000 pluronic F68 40 cherry 100 FD&C red 40 0.1 FD&C blue 1 0.01 EXAMPLE 15 Thiε example illuεtrates a dry granulation of the invention. Ingredient mg mycophenolate mofetil 2 , 000 sodium carboxymethylcelluloεe 200 mannitol 4 , 000 aεpartame 35 potaεεium εorbate 5 pluronic F68 40 cherry 100 FD&C red 40 0 . 1 FD&C blue 1 0 . 01 EXAMPLE 16 This example illustrates a dry granulation of the invention. Ingredient mg mycophenolate mofetil 3,000 xanthan gum 15 colloidal silicon dioxide 75 soy lecithin 15 εorbitol 8,250 aspartame 7.5 sodium methyl paraben 30 berry flavor 45 color (FD&C red #3 0.45 FD&C blue #1 0.09 in a container marked to be filled with purified water to a final predetermined volume of 15 mL. EXAMPLE 17 Ingredient mg mycophenolate mofetil 3,000 xanthan gum 15 colloidal silicon dioxide 75 soy lecithin 15 sorbitol 4,500 aεpartame 15 citric acid 67.5 εodium citrate 150 sodium methyl paraben 30 berry flavor 45 color (FD&C red #3 0.45 FD&C blue #1 0.09 in a container marked to be filled with purified water to a final predetermined volume of 15 mL. EXAMPLE 18 Ingredient mg mycophenolate mofetil 3,000 xanthan gum 15 colloidal εilicon dioxide 75 εoy lecithin 15 sorbitol 8,250 aspartame 7.5 citric acid 7.5 sodium citrate 150 sodium methyl paraben 34.5 mixed fruit flavor 30 color (FD&C red #3 0.093 FD&C yellow #6) 0.0225 in a container marked to be filled with purified water to a final predetermined volume of 15 mL. EXAMP: DE 19 Ingredient mg mycophenolate mofetil 2,000 εodium carboxymethylcellulose 200 mannitol 4,000 aspartame 35 potassium εorbate 5 pluronic F68 40 cherry 100 FD&C red 40 0.1 FD&C blue 1 0.01 EXAMPLE 20 This example illustrates a dry granulation of the invention, provided as in a container marked to be filled with purified water to a final predetermined volume of 450 mL. Ingredient mg mycophenolate mofetil 90,000 εodium carboxymethylcelluloεe 9,000 mannitol 180,000 aεpartame 1,575 pluronic F68 1,800 potaεεium εorbate 225 cherry 4,500 color (red 40:blue 1, 90:10) 4.5 EXAMPLE 21 Thiε example illuεtrates the preparation of a dry granulation formulation of the invention. Ingredient mg/ml^ mycophenolate mofetil 200.0 xanthan gum 1.0 colloidal silicon dioxide 5.0 soy lecithin 1.o εorbitol 300.0 aspartame 1.o citric acid 0.5 sodium citrate 10.0 sodium methyl paraben 2.0 berry flavor 3.o color (FD&C red #3 0.034 FD&C blue #1) 0.006 (*concentration after constitution with water) To prepare the dry granulation mycophenolate mofetil, sorbitol, aspartame, soy lecithin, and xanthan gum were combined in a mixer for 5 minutes. The dye was dissolved with sodium citrate, and citric acid in purified water at approximately 45-55°C. The solution was then cooled to room temperature. This dye/buffer solution was added to the mycophenolate mofetil mixture in a cooled mixer bowl at a rate of approximately 60 ml/min with mixing. In the granulation temperature exceeds 30°C, mixing was stopped and the granulation allowed to cool to 20-24°C. Once the granulation temperature reached 20-24°C, it was mixed for an additional 2 to 8 minutes and then dried. If necessary the granulation was milled to reduce particle size. Colloidal silicon dioxide, flavor and sodium methyl paraben were then added using a blender. EXAMPLE 22 Thiε example illuεtrateε the preparation of a dry granulation formulation of the invention. Ingredient mg/ml* mycophenolate mofetil 200.0 xanthan gum 1.5 colloidal silicon dioxide 10.0 soy lecithin 2.0 aspartame 2.0 citric acid 0.5 sodium citrate 10.0 sodium methyl paraben l.0 orange flavor 1.0 color (FD&C yellow #6) 0.1 ( ♦ concentration after constitution with water) EXAMPLE 23 Thiε example illustrateε the preparation of a dry granulation formulation of the invention. Ingredient mg/ml^ mycophenolate mofetil 200.0 xanthan gum 1.0 colloidal silicon dioxide 5.0 εoy lecithin 1.0 sorbitol 550.0 aspartame 0.5 sodium methyl paraben 2.0 berry flavor 3.0 color (FD&C red #3 0.034 FD&C blue #1) 0.006 (*concentration after constitution with water) EXAMPLE 24 This example illustrates the preparation of a dry granulation formulation of the invention. Ingredient mg/ml^ mycophenolate mofetil 200.0 xanthan gum 1.5 colloidal silicon dioxide 10.0 soy lecithin 2.0 aspartame 2.0 sodium methyl paraben 2.3 mixed fruit flavor 2.0 color (FD&C red #3 0.008 FD&C yellow #6) 0.002 ( ♦ concentration after constitution with water) EXAMPLE 25 This example illuεtrateε the preparation of a dry granulation formulation of the invention. Ingredient mg/ml^ mycophenolate mofetil 200.0 xanthan gum 1.0 colloidal εilicon dioxide 5.0 soy lecithin 1.0 sorbitol 550.0 aspartame 0.5 citric acid 0.5 sodium citrate 10.0 sodium methyl paraben 2.3 mixed fruit flavor 2.0 color (FD&C red #3 0.0062 FD&C yellow #6) 0.0015 ( ♦ concentration after constitution with water) EXAMPLES 26-50 By following the procedures of Examples 1-25 and substituting mycophenolate mofetil with mycophenolic acid, there are obtained the corresponding respective suεpensions and dry granulations. While the present invention has been described with reference to the specific embodiments thereof, it εhould be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the true spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation, material, composition of matter, process, process step or εteps, to the objective, spirit and scope of the present invention. All εuch modificationε are intended to be within the εcope of the claims appended hereto. All patents and publications cited above are hereby incorporated by reference.

Claims: WHAT IS CLAIMED IS: 1. A pharmaceutical formulation comprising: Ingredient % wt/vol mycophenolate mofetil or mycophenolic acid 7.5 - 30.0 suspending/viεcosity agent 0.1 - 3.0 wetting agent 0 - 0.5 sweeteners 30.0 - 70.0 flavor 0.1 - 2.0 flavor enhancer/bitter maεkant 0 - 1.0 buffer to pH 5.0 - 7.0 0.5 - 1.5 antimicrobial agent 0 - 1.0 color 0 - 0.01 purified water q.ε. to 100 as a liquid suεpension εuitable for oral administration. 2. The pharmaceutical formulation of Claim 1 having: Ingredient % wt/vol mycophenolate mofetil 20 hydroxypropylmethylcellulose 0.25 microcrystalline celluloεe 0.25 xanthan gum 0.1 sorbitol, 70% solution 30 - 50 Lycasin * (maltitol syrup) 10 - 30 sucrose 0 - 10 fructoεe 0 - 10 aεpartame 0 - 0.5 lecithin 0 - 0.1 citric acid 0.02 - 0.25 εodium phoεphate dibasic 0.19 - 0.67 methyl paraben 0 - 0.18 propyl paraben 0 - 0.02 flavor 0.3 - 1.0 Magnasweet * 0 - 1 color 0.005 purified water q.S. to 100 as a liquid suspension suitable for oral administration. 3. A pharmaceutical formulation of Claim 1 having 20 % wt/vol mycophenolate mofetil. 4. The pharmaceutical formulation of Claim 1 having: Ingredient % wt/vol mycophenolate mofetil 20 microcryεtalline celluloεe 0.2 xanthan gum 0.1 sorbitol, 70% solution 30 - 50 Lycasin * (maltitol syrup) 10 - 30 sucrose 0 - 10 fructose 0 - 10 aspartame 0 - 0.5 lecithin 0 - 0.5 citric acid 0.02 - 0.25 εodium phosphate dibasic 0.19 - 0.8 sodium methyl paraben 0 .- 0.18 propyl paraben 0 - 0.02 flavor 0.1 - 1.0 Magnasweet * 0 - 1 color 0.005 purified water q.s. to 100 iquid suspension suitable for oral administration. 5. The pharmaceutical formulation of Claim 4 having: Ingredient % wt/vol mycophenolate mofetil 20 microcrystalline celluloεe 0.2 xanthan gum 0.1 εorbitol, 70% solution 50 Lycasin * (maltitol εyrup) 10 sucrose 10 soy lecithin 0.1 citric acid 0.06 sodium phosphate dibasic 0.7 sodium methyl paraben 0.04 flavor <0.3 color 0.005 purified water q.s. to 100 iquid suεpension suitable for oral administration. 6. A pharmaceutical formulation comprising: Ingredient mg/mL mycophenolate mofetil or mycophenolic acid 75 300 suεpending/viscoεity agent 1 - 30 wetting agent 0 - 10 εweeteners 1 - 1200 flavor 0. 1 - 100 flavor enhancer/bitter maskant 0 - 50 antimicrobial agent 0 - 10 color 0 - 2 as a dry granulation suitable, when constituted with water, for forming a suspension for oral administration, where mg/mL represents concentration after constitution with water. 7. A pharmaceutical formulation of Claim 6 having 200 mg/mL mycophenolate mofetil. 8. A pharmaceutical formulation of Claim 6, having: Ingredient mg/mL mycophenolate mofetil 200 sodium carboxymethylcellulose 20 mannitol 400 aspartame 3.5 pluronic F68 4 potasεium sorbate 0.5 cherry 10 color (red 40:blue 1, 90:10) 0.01 as a dry granulation εuitable, when constituted with water, for forming a suspension for oral administration, where mg/mL representε concentration after conεtitution with water. 9. A pharmaceutical formulation of Claim 6, having: Ingredient mg/mL mycophenolate mofetil 200 xanthan gum 1 - 1.5 colloidal εilicon dioxide 5 - 10 εorbitol 0 - 550 aεpartame 0 - 3.0 εoy lecithin 1 - 2 sodium methyl paraben 0.5 - 2.5 flavor 1 - 3 color (to complement the flavor) 1 - 3 aε a dry granulation εuitable, when conεtituted with water, for forming a εuspenεion for oral administration, where mg/mL representε concentration after constitution with water. 10. A pharmaceutical formulation of Claim 6, comprising: Ingredient mg mycophenolate mofetil 90,000 εodium carboxymethylcelluloεe 9,000 mannitol 180,000 aεpartame 1,575 pluronic F68 1,800 potasεium εorbate 225 cherry 4,500 color (red 28:blue 1, 90:10) 4.5 in a container marked to be filled with purified water to a final predetermined volume of 450 mL. 11. A pharmaceutical formulation of Claim 6, compriεing: Ingredient mg mycophenolate mofetil 90,000 xanthan gum 450 colloidal εilicon dioxide 2,250 εoy lecithin 450 εorbitol 247,500 aspartame 225 εodium methyl paraben 900 berry flavor 1,350 color (FD&C red #3 13.5 FD&C blue #1 2.7 in a container marked to be filled with purified water to a final predetermined volume of 450 mL. 12. A pharmaceutical formulation of Claim 6, compriεing: Ingredient mg mycophenolate mofetil 90,000 xanthan gum 450 colloidal silicon dioxide 2,250 soy lecithin 450 sorbitol 135,000 aspartame 450 citric acid 225 sodium citrate 4,500 sodium methyl paraben 900 berry flavor 1,350 color (FD&C red #3 13.5 FD&C blue #1 2.7 in a container marked to be filled with purified water to a final predetermined volume of 450 mL. 13. A pharmaceutical formulation of Claim 6, comprising: Ingredient mg mycophenolate mofetil 90,000 xanthan gum 675 colloidal εilicon dioxide 4,500 εoy lecithin 900 aεpartame 900 sodium methyl paraben 1,035 mixed fruit flavor 900 color (FD&C red #3 3.6 FD&C yellow #6) 0.9 in a container marked to be filled with purified water to a final predetermined volume of 450 mL. 14. A pharmaceutical formulation of Claim 6, comprising: Ingredient mg mycophenolate mofetil 90,000 xanthan gum 450 colloidal εilicon dioxide 2,250 εoy lecithin 450 εorbitol 247,500 aεpartame 225 citric acid 225 εodium citrate 4,500 sodium methyl paraben 1,035 mixed fruit flavor 900 color (FD&C red #3 2.79 FD&C yellow #6) 0.675 in a container marked to be filled with purified water to a final predetermined volume of 450 mL. 15. A pharmaceutical formulation of Claim 6, compriεing: Ingredient mg mycophenolate mofetil 90,000 xanthan gum 675 colloidal silicon dioxide 4,500 εoy lecithin 900 aεpartame 900 citric acid 225 εodium citrate 4,500 sodium methyl paraben 450 orange flavor 450 color (FD&C yellow #6) 45 in a container marked to be filled with purified water to a final predetermined volume of 450 mL. 16. The pharmaceutical formulation of Claim 6 provided in a container marked to be filled with purified water to a final predetermined volume. 17. A pharmaceutical formulation consiεting essentially of: Ingredient % wt/vol mycophenolate mofetil 20 hydroxypropyl methylcellulose 0 .. 25 microcrystalline cellulose 0 . . 25 xanthan gum 0 . . 1 sorbitol solution 50 sucrose 10 Lycasin * 10 lecithin 0 . . 1 methyl paraben 0 . . 036 propylparaben 0 . , 004 grape 1 . , 0 aniεe 0 . . 01 color (red 28: blue 1, 90:10) 0 . , 005 citric acid 0 . , 0542 sodium phoεphate dibasic 0 . , 673 purified water q.s. to 100 adjuεted to a pH of 7, aε a liquid suspension suitable for oral administration. 18. A pharmaceutical formulation consisting essentially of: Ingredient % wt/vol mycophenolate mofetil 20 microcrystalline cellulose 0.2 xanthan gum 0.1 sorbitol solution 50 Lycasin * 10 sucrose 10 lecithin 0.1 citric acid 0.06 sodium phoεphate dibasic 0.7 sodium methyl paraben 0.04 flavor <0.3 color (to complement the flavor) 0.005 purified water q.s. to 100 adjusted to a pH of 7, as a liquid suspension suitable for oral administration. 19. A process for the preparation of a pharmaceutical formulation of Claim 1 comprising: a. adding and dispersing the antimicrobial agent to heated water (about 70°C) , followed by adding the suεpending and/or viscosity agents (preferably microcrystalline celluloεe, followed by xanthan gum) ; b. diεsolving, with mixing, the buffer(ε) (preferably citric acid, followed by εodium phosphate dibasic), followed by adding the sweetener(s) , wetting agent (ε), dye(s), flavor enhancer(ε) , and flavor(s); and c. adding the active compound (mycophenolate mofetil or mycophenolic acid) to the mixture from step b; followed by mixing the liquid well to form a suεpension. 20. A process for the preparation of a dry granulation of Claim 6 comprising: a. combining mycophenolate mofetil, sweetener(s) , wetting agent(s), and εuspending and/or viscosity increasing agen (s) in a mixer; b. diεεolving the dye (s) and buffer(s) in water; c. combining the εolution of step (b) to the mixer bowl of step (a) and mixing until a desired granulation εize iε obtained; d. drying the granulation then milling to reduce particle size; e. adding the suspending and/or viscosity increasing agent(s), flavo (s) and antimicrobial agent(s) to the granulation of step (d) using a blender. 21. Uεe of a formulation of Claim for the treatment of immunoεuppreεεive diεeases, inflammatory diεeases, tumorε, proliferative diseases, viral diseaεeε and psoriatic diseaεeε. 22. Use of a dry granulation of Claim 6 for the preparation of a pharmaceutical formulation for the treatment of immunosuppreεsive diseaεeε, inflammatory diεeaseε, tumors, proliferative diseases, viral diseases and psoriatic diseaseε.

Inventors: GU LEO, HEGDE SAYEE G, JOSHI BINDU, LIDGATE DEBORAH M, WANG-KESSLER LI-HUA, GU, LEO, HEGDE, SAYEE, G., JOSHI, BINDU, LIDGATE, DEBORAH, M., WANG-KESSLER, LI-HUA
Applicants: SYNTEX INC, SYNTEX (U.S.A.) INC.
Application year: 1994
Main classification: A61K31
IPC codes: A61K9, A61K31, A61K47, A61P17, A61P29, A61P31, A61P35, A61P37